Fixed some doc pointers to 4.3 docs
Commented out valout_nc.f in library Makefile since netcdf might not be installed.
From 4.6.2 final version
Merge remote-tracking branch 'upstream/master' into rjl

* upstream/master:
Changed frictiondepth from 1e6 to 200 in chile2010
Fixed 7/3 bug in Manning friction term.

7/3 evaluates to 2 in Fortran, changed to 7.d0/3.d0.
This affects onshore inundation.
Little effect on apps/tsunami/chile2010 except at later times change to DART buoy gauge data due to changes in waves reflected from coastlines.
No change to bowl-* examples since friction is not used in these.
Adding new docs on geoclaw
Added okada2.py and dtopotools.py from CC project
Added chile2010b example that goes out far enough to record DART 51406. Improved source...

Now using final USGS source and new okada2.py model. Refine more in source region.  Compare DART results to detided data.
added data for chile2010b
Cleaned up maketopo.py, removed unused functions.
Added print of Mw to read_subfault_model
Fixed README files for chile examples
improved geoclaw docs
Merge pull request #13 from rjleveque/rjl

4.6.3beta incomplete state